File(GENERATE): Process genex evaluation files for each language.

Source/cmGeneratorExpressionEvaluationFile.cxx

@@ -38,13 +38,15 @@ cmGeneratorExpressionEvaluationFile::cmGeneratorExpressionEvaluationFile(
 
 //----------------------------------------------------------------------------
 void cmGeneratorExpressionEvaluationFile::Generate(const std::string& config,
+              const std::string& lang,
               cmCompiledGeneratorExpression* inputExpression,
               std::map<std::string, std::string> &outputFiles, mode_t perm)
 {
   std::string rawCondition = this->Condition->GetInput();
   if (!rawCondition.empty())
     {
-    std::string condResult = this->Condition->Evaluate(this->Makefile, config);
+    std::string condResult = this->Condition->Evaluate(this->Makefile, config,
+                                                       false, 0, 0, 0, lang);
     if (condResult == "0")
       {
       return;
@@ -60,9 +62,11 @@ void cmGeneratorExpressionEvaluationFile::Generate(const std::string& config,
     }
 
   const std::string outputFileName
-                    = this->OutputFileExpr->Evaluate(this->Makefile, config);
+                    = this->OutputFileExpr->Evaluate(this->Makefile, config,
+                                                     false, 0, 0, 0, lang);
   const std::string outputContent
-                          = inputExpression->Evaluate(this->Makefile, config);
+                          = inputExpression->Evaluate(this->Makefile, config,
+                                                      false, 0, 0, 0, lang);
 
   std::map<std::string, std::string>::iterator it
                                           = outputFiles.find(outputFileName);
@@ -75,7 +79,8 @@ void cmGeneratorExpressionEvaluationFile::Generate(const std::string& config,
       }
     std::ostringstream e;
     e << "Evaluation file to be written multiple times for different "
-         "configurations with different content:\n  " << outputFileName;
+         "configurations or languages with different content:\n  "
+      << outputFileName;
     this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str());
     return;
     }
@@ -97,15 +102,23 @@ void cmGeneratorExpressionEvaluationFile::Generate(const std::string& config,
 void cmGeneratorExpressionEvaluationFile::CreateOutputFile(
                                               std::string const& config)
 {
-  std::string name = this->OutputFileExpr->Evaluate(this->Makefile, config);
+  std::vector<std::string> enabledLanguages;
+  cmGlobalGenerator *gg
+                  = this->Makefile->GetLocalGenerator()->GetGlobalGenerator();
+  gg->GetEnabledLanguages(enabledLanguages);
+
+  for(std::vector<std::string>::const_iterator le = enabledLanguages.begin();
+      le != enabledLanguages.end(); ++le)
+    {
+    std::string name = this->OutputFileExpr->Evaluate(this->Makefile, config,
+                                                      false, 0, 0, 0, *le);
     cmSourceFile* sf = this->Makefile->GetOrCreateSource(name);
     sf->SetProperty("GENERATED", "1");
 
-  cmGlobalGenerator *gg
-                  = this->Makefile->GetLocalGenerator()->GetGlobalGenerator();
     gg->SetFilenameTargetDepends(sf,
                           this->OutputFileExpr->GetSourceSensitiveTargets());
     }
+}
 
 //----------------------------------------------------------------------------
 void cmGeneratorExpressionEvaluationFile::Generate()
@@ -153,13 +166,23 @@ void cmGeneratorExpressionEvaluationFile::Generate()
     {
     allConfigs.push_back("");
     }
+
+  std::vector<std::string> enabledLanguages;
+  cmGlobalGenerator *gg
+                  = this->Makefile->GetLocalGenerator()->GetGlobalGenerator();
+  gg->GetEnabledLanguages(enabledLanguages);
+
+  for(std::vector<std::string>::const_iterator le = enabledLanguages.begin();
+      le != enabledLanguages.end(); ++le)
+    {
     for(std::vector<std::string>::const_iterator li = allConfigs.begin();
         li != allConfigs.end(); ++li)
       {
-    this->Generate(*li, inputExpression.get(), outputFiles, perm);
+      this->Generate(*li, *le, inputExpression.get(), outputFiles, perm);
       if(cmSystemTools::GetFatalErrorOccured())
         {
         return;
         }
       }
     }
+}

Source/cmGeneratorExpressionEvaluationFile.h

@@ -34,7 +34,7 @@ public:
   void CreateOutputFile(std::string const& config);
 
 private:
-  void Generate(const std::string& config,
+  void Generate(const std::string& config, const std::string& lang,
               cmCompiledGeneratorExpression* inputExpression,
               std::map<std::string, std::string> &outputFiles, mode_t perm);
 

Tests/RunCMake/File_Generate/COMPILE_LANGUAGE-genex-result.txt

@@ -0,0 +1 @@
+0

Tests/RunCMake/File_Generate/COMPILE_LANGUAGE-genex.cmake

@@ -0,0 +1,12 @@
+
+enable_language(CXX C)
+
+add_library(empty empty.cpp empty.c)
+target_compile_options(empty
+  PRIVATE LANG_IS_$<COMPILE_LANGUAGE>
+)
+
+file(GENERATE
+  OUTPUT opts-$<COMPILE_LANGUAGE>.txt
+  CONTENT "$<TARGET_PROPERTY:empty,COMPILE_OPTIONS>\n"
+)

Tests/RunCMake/File_Generate/OutputConflict-stderr.txt

@@ -1,5 +1,5 @@
 CMake Error in CMakeLists.txt:
   Evaluation file to be written multiple times for different configurations
-  with different content:
+  or languages with different content:
 
   .*output.txt

Tests/RunCMake/File_Generate/RunCMakeTest.cmake

@@ -17,6 +17,16 @@ if (NOT file_contents MATCHES "generated.cpp.rule")
   message(SEND_ERROR "Rule file not in target sources! ${file_contents}")
 endif()
 
+if (NOT RunCMake_GENERATOR MATCHES "Visual Studio")
+  run_cmake(COMPILE_LANGUAGE-genex)
+  foreach(l CXX C)
+    file(READ "${RunCMake_BINARY_DIR}/COMPILE_LANGUAGE-genex-build/opts-${l}.txt" l_defs)
+    if (NOT l_defs STREQUAL "LANG_IS_${l}\n")
+      message(FATAL_ERROR "File content does not match: ${l_defs}")
+    endif()
+  endforeach()
+endif()
+
 set(timeformat "%Y%j%H%M%S")
 
 file(REMOVE "${RunCMake_BINARY_DIR}/WriteIfDifferent-build/output_file.txt")

Tests/RunCMake/File_Generate/empty.c

@@ -0,0 +1,8 @@
+
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+int empty_c()
+{
+  return 0;
+}